Renesas RX100 Series User Manual page 732

RX13T Group
BBSY Flag (Bus Busy Detection Flag)
The BBSY flag indicates whether the I
This bit is set to 1 when the SDA0 line changes from high to low under the condition of SCL0 line = high, assuming that
a start condition has been issued.
When the SDA0 line changes from low to high under the condition of SCL0 line = high, this bit is set to 0 after the bus
free time (specified in the ICBRL register) start condition is not detected, assuming that a stop condition has been issued.
[Setting condition]
 When a start condition is detected
[Clearing conditions]
 When the bus free time (specified in the ICBRL register) start condition is not detected after detecting a stop
condition
 When 1 is written to the ICCR1.IICRST bit with the ICCR1.ICE bit set to 0 (RIIC reset)
R01UH0822EJ0100 Rev.1.00
Jul 31, 2019
2
C-bus is occupied (bus busy state) or released (bus free state).
2
24. I C-bus Interface (RIICa)
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